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Problem Faced by Surface Based Telescope and Telescopes in Space

Large apertur...

Question

Large aperture objective is used in telescope. Which of the following is not a function of the objective?

A

Increasing the brightness of image.

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B

Reducing image size.

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C

Increasing field of view.

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D

Increasing intensity by gathering more light.

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Solution

The correct option is A Reducing image size.
Large aperture objective is used in telescope as it can help in increasing the brightness of image, increasing field of view and increasing intensity by gathering more light.

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Q. Under what condition in Telescope does the brightness of image increase

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\frac{2 a}{1.22 λ}

Q. Assertion :The focal length of the objective in a telescope is larger than that of eyepiece. Reason: Magnifying power of telescope increases when the aperture is large

Q. Statement I: In a telescope, the eyepiece is used to form a large virtual image of the object.
Statement II: In a telescope, the main function of the objective lens is to collect the light coming from distant objects.

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Problem Faced by Surface Based Telescope and Telescopes in Space

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